JPH057684Y2 - - Google Patents

Description

[Detailed Description of the Invention] <<Industrial Application Field>> This invention relates to a vehicle lamp in which an inner lens and an outer lens are attached to a front opening of a housing.

<Prior Art> In recent years, vehicle lighting equipment has tended to become larger in the lateral direction to improve visibility, and in order to become thinner and lighter, parabolic mirrors that protrude more toward the rear are being used. Rather than using a Fresnel prism, there is a tendency to adopt a double lens structure in which an inner lens with a Fresnel prism is used and an outer lens is placed in front of it. Further, when the lamp is a rear combination lamp, the red reflex reflector is provided on the lens surface of the tail stop lamp, which is also red.

<<Problems to be solved by the invention>> As the size of the lamp becomes larger in the horizontal direction, the shape of the reflex reflector also becomes larger due to the overall balance. However, the larger the reflex reflector comes at the expense of the light distribution of the tail stop lamp in which it is installed.

The purpose of this invention is to provide an improved vehicular lamp that satisfies the light distribution characteristics of the lamp to which the reflex reflector is attached, and that allows the reflex reflector itself to be made larger.

<<Means for Solving the Problem>> A vehicle lamp is provided with an inner lens having an outer lens and a Fresnel prism on the back surface attached to the front opening of the housing, and a reflex reflector mounting recess formed on the surface of the inner lens. , a reflex reflector in which a peripheral mounting leg is ultrasonically welded into the reflex reflector mounting recess and a plurality of element blocks are connected by a connecting part that is a transparent part; and an arbitrary element block of the reflex reflector. a receiving seat for ultrasonic welding protrudingly formed on the back surface of the reflex reflector mounting recess corresponding to the effective light emitting area of the reflex reflector; and a reflex reflector mounting recess corresponding to at least the connecting portion of the reflex reflector. It has a Fresnel prism formed on the back surface of the.

<<Operation>> The reflex reflector is composed of a plurality of element blocks connected by a connecting part which is a light-transmitting part, and there is a structure on the back side of the mounting recess of the inner lens to which the reflex reflector is attached, at least corresponding to the connecting part of the element blocks. Since the Fresnel prism is formed, the amount of light emitted by the lamp can be ensured, and the reflex reflector can be made larger. Further, when the reflector is ultrasonically welded into the mounting recess, the receiving seat protruding from the back surface of the mounting recess is used, so the Fresnel prism formed on the back surface of the mounting recess is not crushed.

《Example》 Fig. 1 is a front view of a vehicle lamp showing an embodiment of this invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 is an enlarged - line of Fig. 1. The sectional view, FIG. 4, is a partially exploded perspective view of the lamp shown in FIG. 1.

This lamp is a horizontally long rear combination lamp, with a red tail stop lamp 1 on the top half, an orange turn signal lamp 2 on the outside of the bottom half, and a white backlight lamp 3 on the inside. A molding 5 is attached to each boundary. This lamp is provided with a wrap-around portion 6 along the rear corner of the vehicle on the outer side. This embodiment will be explained below, focusing on a tail stop lamp 1 embodying this idea.

The tail stop lamp 1 includes an outer lens 11 having a leg portion 11a fitted by hot melt 10 into a groove 9 formed at the front opening periphery of a tail stop lamp light chamber 8 formed in a common housing 7; placed inside,
An inner lens 12 held between the outer lens 11 and the shelf 7a of the housing 7, a transparent sheet 13 stuck to the surface of the inner lens 12, and a reflex reflector 14 bonded to the surface of the inner lens 12. , and two lamp bulbs 15 arranged within the lamp chamber 8.

The outer lens 11 is made of red transparent acrylic resin and is formed by injection molding to a thickness of about 3 mm. The inner lens 12 is made of colorless and transparent acrylic resin, and has a flange portion 12a on the periphery excluding the upper side.
It has a fisheye prism 16 on the entire front surface and a Fresnel prism 17 on the entire back surface, and is molded to a thickness of about 3 mm by injection molding. The transparent sheet 13 has a rectangular hole 13a approximately in the center into which the reflex reflector 14 is inserted, and is press-molded into a flat shape from a colorless and transparent polycarbonate resin sheet with a thickness of about 0.5 mm, and has a gradation pattern on its surface. The pattern is printed in black ink. After printing, the surface of the transparent sheet 13 is subjected to matte printing, that is, matte processing, using an ink called LOV Mat Clear manufactured by Seiko Advance. This matting treatment may be performed by using other solutions or paints, or by liquid honing.

Such a transparent sheet 13 has an L-shaped hook 13b (see FIG. 4) formed at the end on the wrap-around side of the transparent sheet 13, which is inserted into a locking hole 12b formed in the corresponding portion of the inner lens 12. As the transparent sheet is inserted, both upper and lower edges of the front side of the transparent sheet are linearly ultrasonically welded to beads for ultrasonic welding formed along both upper and lower edges of the front side of the inner lens. Pressure, heat, vibration, etc. during this ultrasonic welding cause distortion in the thin transparent sheet 13, distorting the surface, but since the surface is treated with a matte finish, even if it receives external light, it will not be diffused. The distortion becomes indistinguishable.

Approximately in the center of the surface of the inner lens 12 is a mounting recess for mounting a rectangular reflex reflector 14, as shown in the view from the front side in FIG. 5 and the view from the back side in FIG. 18 are formed. The reflex reflector 14 is
Five element blocks 19 are arranged at equal intervals in two rows, upper and lower, and are connected to each other by a connecting part 20, which is a lattice-shaped light-transmitting part that is one step lower than the element blocks 19. A large number of right triangular pyramid elements are formed on the back surface of each element block 19, and a fisheye prism 16, which is the same as the surface of the inner lens 12, is formed on the surface of each connecting portion 20.

The reflector 14 is provided with a mounting leg portion 21 on the periphery of its back surface, and this mounting leg portion 21 is cut off at a portion 22 corresponding to the six element blocks 19 in the center excluding the element blocks 19 at both ends. There is. Furthermore, L-shaped beads 23 for ultrasonic welding are formed on the inner periphery of the back surface of the element block 19 at both ends.

On the other hand, the mounting recess 18 of the inner lens 12 to which this reflex reflector 14 is mounted is
It is shaped to a size and depth that allows the mounting leg portion 21 of the reflex reflector 14 to fit therein. Furthermore, the six element blocks 1 at the center of the reflex reflector 14 are located at the bottom of the mounting recess 18.
Six ventilation holes 24 corresponding to the number 9 are formed, and reflex reflectors 14 are formed on the back side of both ends of the ventilation holes 24.
Receiving seats 2 corresponding to the element blocks 19 at both ends of the
5 is formed to protrude by about 1 mm. The ventilation hole 24 and the receiving seat 25 are formed into rectangular shapes of the same size that fit within the effective light emitting area of each element block 19. Although the fisheye prism 16 is not formed on the bottom surface of the mounting recess 18, the surrounding Fresnel prism 16 is formed on the back surface of the mounting recess 18 in a lattice-shaped connecting portion 26 excluding the ventilation hole 24 and the receiving seat 25.
A Fresnel prism 17 that is continuous with the prism 7 is formed.

After bonding the transparent sheet 13 described above to the inner lens 12, align and place the receiving seat 25 of the inner lens 12 on the receiving stand of an ultrasonic welding machine.
Furthermore, put the reflex reflector 14 into the mounting recess 18 and place it thereon.
3 is melted by applying pressure and vibration, and the reflex reflector 14 is bonded to the inner lens 12. At this time, since the pressurizing force of the horn tip is received by the receiving seat 25 protruding from the bottom back surface of the mounting recess 18, the Fresnel prism 17 around it will not be crushed.

The inner lens 12 to which the reflex reflector 14 is welded in this way is supported by the shelf 7a around the front opening of the housing 7, as shown in FIG. Groove 9 around the front opening of 7
By sealing with hot melt 10, the outer lens 11 is sandwiched between the outer lens 11 and the housing shelf 7a via the peripheral flange 12a.

Generally, when a reflex reflector is viewed from one side of its right triangular pyramidal element, the inside becomes transparent. In this lamp, when the inside of the reflex reflector 14 is seen through the front outer lens 11, the peripheral edge of the ventilation hole 24 of the reflex reflector mounting recess 18 becomes visible as a black line. There is no such ventilation hole 24, and there is a Fresnel prism 1 at that position that is the same as the surrounding area.
7 is formed, there is no problem even if the inside can be seen through, but if there is a ventilation hole 24 and a Fresnel prism 17 is formed around it, in contrast, the periphery of the ventilation hole 24 becomes transparent. It looks unnecessarily dark and looks bad. However, in this lamp, the receiving seat 25, which has the same size and shape as the ventilation hole 24 and does not have a Fresnel prism formed therein, is formed at equal intervals with the ventilation hole 24, so the rear part of the reflex reflector 14 is the same. It is transparent and looks as if it was purposely designed that way, reducing the deterioration in appearance.

In addition, in such a lamp, the lamp bulb 1
5 lights up, the ridge-shaped connecting portion 26 on the back side of the reflex reflector mounting recess 18 of the inner lens 12
A Fresnel prism 17 is formed on the rear surface of the reflex reflector 14 , and a fisheye prism 16 is formed on a corresponding ridge-shaped connecting portion 20 on the back surface of the reflex reflector 14 .
Each element block 1 of the reflex reflector 14 emits light in substantially the same manner as the surface of the reflector 14.
9 floats and simply reflects reflector 14
Not only can it be made larger without sacrificing the light distribution of Tail Stop Lamp 1, but when combined with the upper and lower gradation pattern, it creates a truly stunning light form.

Furthermore, the space 27 between the outer lens 11 and the inner lens 12 is sealed by sealing the leg portion 11a at the periphery of the outer lens 11 into the groove 9 of the housing 7 with the hot melt 10.
Mounting legs 21 on the periphery of the reflex reflector 14
Since a part 22 of the inner lens 12 is cut out and a ventilation hole 24 is formed at the bottom of the reflex reflector mounting recess 18 of the inner lens 12, the inter-lens space 27 and the lamp chamber 8 are connected through the notch 22 and the ventilation hole 24. We will communicate. Furthermore, a boss 29 having a through hole 28 is protruded from the rear part of the housing 7 facing the ventilation hole 24.
Since the grommet 30 is inserted into the grommet 9, the inter-lens space 27 communicates with the outside air via the lamp chamber 8 and the grommet 30. As a result,
Even if the front part of this lamp is exposed to sunlight and the wrap-around part 6 is in the shade, the inter-lens space 2 on the front part side
Inside 7 is a light chamber 8 whose temperature is lower than the air inside.
The inside air is further introduced and cooled, and the temperature difference with the side of the wrap-around portion 6 is reduced, thereby preventing fogging in the wrap-around portion 6.

《Effects of the invention》 As mentioned above, the vehicle lamp according to this invention has the following effects:
The reflex reflector consists of a plurality of element blocks connected by connecting parts which are light-transmitting parts, and a Fresnel prism is provided on the back surface of the mounting recess of the inner lens to which the reflex reflector is attached, corresponding to at least the connecting parts of the element blocks. Because of this, it is possible to ensure the amount of light emitted by the lamp and also to increase the size of the reflector. Further, when the reflector is ultrasonically welded into the mounting recess, the receiving seat protruding from the back surface of the mounting recess is used, so the Fresnel prism formed on the back surface of the mounting recess is not crushed.

[Brief explanation of the drawing]

FIG. 1 is a front view of a vehicle lamp showing an embodiment of the invention, FIG. 2 is a sectional view taken along the line -- in FIG. 1, and FIG. 3 is an enlarged sectional view taken along the line -- in FIG. Fig. 4 is a partially exploded perspective view of the lamp shown in Fig. 1, Fig. 5 is a partially exploded, enlarged perspective view of the inner lens and reflex reflector in the lamp as seen from the surface side, and Fig. 6 is a partially exploded perspective view of the lamp shown in Fig. 1. FIG. 2 is a partially exploded, enlarged perspective view of the reflex reflector as seen from the back side. 6... Wrap around part, 7... Housing, 8...
Lamp room, 9...Groobe, 10...Hotmelt, 11
... Outer lens, 11a ... Leg section, 12 ... Inner lens, 12a ... Flange section, 12b ...
Hook claw, 13... Transparent sheet, 13b... Locking hole, 14... Reflector, 16...
Fisheye prism, 17...Fresnel prism, 19
...Element block, 21...Mounting leg, 22...
Notch part, 24...Vent hole, 25...Socket, 2
7... Space between lenses, 30... Grommet.

Claims (1)

[Scope of utility model registration request] A vehicle lamp in which an inner lens having an outer lens and a Fresnel prism on the back surface is attached to the front opening of the housing, and a reflex reflector mounting recess formed on the surface of the inner lens, and a reflex reflector mounting recess formed in the reflex reflector mounting recess. A reflex reflector in which peripheral mounting legs are ultrasonically welded and a plurality of element blocks are connected by a connecting part that is a light-transmitting part, and a reflection reflector corresponding to an effective light emitting area of any element block of the reflex reflector. A receiving seat for ultrasonic welding protrudingly formed on the back surface of the reflex reflector mounting recess, and a Fresnel prism formed on the back surface of the reflex reflector mounting recess corresponding to at least the connecting portion of the reflex reflector. A vehicle light fixture having.